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1. |
Graph the solution set of  |
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2. |
Choose the graph that is not a function. |
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B. |
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3. |
Write  in standard form where A, B, and C are integers whose greatest common factor is 1. |
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A. |
3x - 8y = 2 |
B. |
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C. |
3x + 8y = 16 |
D. |
3x - 8y = 16 |
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Hint |
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4. |
Choose the graph of  |
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5. |
When two lines have different slopes, the graphs of the equations are _________ |
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A. |
horizontal lines. |
B. |
intersecting lines. |
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C. |
parallel lines. |
D. |
the same line. |
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Hint |
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6. |
Solve the system of equations by graphing. 
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A. |
no solution |
B. |
(-1, 7) |
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C. |
infinitely many solutions |
D. |
(0, 3) |
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Hint |
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7. |
Use Cramer's rule to find the value of n in the system of equations. 
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B. |
-22 |
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8. |
Solve the system of inequalities by graphing. 
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9. |
A baker earns 15¢ profit per glazed doughnut g, and 40¢ profit per jelly doughnut j. If a customer wants to buy no more than a dozen doughnuts and wants to try at least one of each kind, what is the maximum profit the baker can earn? |
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A. |
$4.80 |
B. |
$1.80 |
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C. |
$3.30 |
D. |
$4.55 |
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Hint |
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10. |
Determine which ordered triple is a solution of the system of equations. 
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A. |
(1, -2, 6) |
B. |
(0, 0, 11) |
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C. |
(0, 1, -14) |
D. |
(-1, 2, -16) |
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Hint |
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11. |
Choose the matrix that represents the ordered triple (5, -7, 1). |
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B. |
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C. |
[5 -7 1] |
D. |
[1 -7 5] |
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12. |
Write a matrix for the system of equations. 
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13. |
If  what is the value of  |
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B. |
27 |
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C. |
29 |
D. |
89 |
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14. |
Solve the inequality | 6x + 2 | < 5. |
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B. |
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15. |
Graph the relation represented by y = x2 – x + 1. |
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16. |
Consider the function f (x) = -2(x + 8). Is this function a linear function? Why or why not? |
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A. |
No, f is not a function. |
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B. |
Yes, the coefficient of x is not zero. |
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C. |
Yes, the function can be written in the form f (x) = mx + b. |
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D. |
No, the function cannot be written in the form f (x) = mx + b. |
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Hint |
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17. |
Solve the system 4y – 6x + 8z = 13, 10y – 15x + 20z = 6, y – 5x + 2z = 5. |
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A. |
no solution |
B. |
infinite solutions |
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C. |
(-3, 1, 7) |
D. |
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Hint |
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18. |
What are the dimensions of matrix A if  |
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3 × 3 |
B. |
3 × 4 |
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C. |
4 × 4 |
D. |
4 × 3 |
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Hint |
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19. |
What is always true of an n × n matrix? |
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A. |
It has at least two rows and two columns. |
B. |
It is a column matrix. |
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C. |
It is a row matrix. |
D. |
It is a square matrix. |
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Hint |
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20. |
What is the 4 × 4 identity matrix? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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